The use of response surface methodology for modelling and analysis of water and wastewater treatment processes: a review

2013 ◽  
Vol 69 (3) ◽  
pp. 464-478 ◽  
Author(s):  
Abhilash T. Nair ◽  
Abhipsa R. Makwana ◽  
M. Mansoor Ahammed
Keyword(s):  
Response Surface Methodology ◽  
Wastewater Treatment ◽  
Response Surface ◽  
Advanced Oxidation Processes ◽  
Water And Wastewater Treatment ◽  
Treatment Processes ◽  
Several Variables ◽  
Building Models ◽  
Modelling Techniques ◽  
Water And Wastewater

In recent years, response surface methodology (RSM) has been used for modelling and optimising a variety of water and wastewater treatment processes. RSM is a collection of mathematical and statistical techniques for building models, evaluating the effects of several variables, and obtaining the values of process variables that produce desirable values of the response. This paper reviews the recent information on the use of RSM in different water and wastewater treatment processes. The theoretical principles and steps for its application are first described. The recent investigations on its application in coagulation–flocculation, adsorption, advanced oxidation processes, electro-chemical processes and disinfection are reviewed. The limitations of the methodology are highlighted. Attempts made to improve the RSM by combining it with other modelling techniques are also described.

Application of UV-Based Advanced Oxidation Processes in Water and Wastewater Treatment

2019 ◽  
pp. 384-414 ◽  
Author(s):  
Nurazim Ibrahim ◽  
Sharifah Farah Fariza Syed Zainal ◽  
Hamidi Abdul Aziz
Keyword(s):  
Advanced Oxidation Processes ◽  
Degradation Mechanism ◽  
Advanced Oxidation ◽  
Water And Wastewater Treatment ◽  
Current Application ◽  
Principal Mechanism ◽  
Low Concentration ◽  
Oxidation Processes ◽  
Treatment Processes ◽  
Water And Wastewater

The presence of hazardous micropollutants in water and wastewater is one of the main concerns in water management system. This micropollutant exists in a low concentration, but there are possible hazards to humans and organisms living in the water. Moreover, its character that is recalcitrant to microbiological degradation makes it difficult to deal with. Advanced oxidation processes (AOPs) are efficient methods to remove low concentration micropollutants. AOPs are a set of processes consisting the production of very reactive oxygen species which able to destroy a wide range of organic compounds. The main principal mechanism in UV-based radical AOP treatment processes is the use ultraviolet light to initiate generation of hydroxyl radicals used to destroy persistent organic pollutants. Therefore, this chapter presents an overview on the principle of radical oxidant species generation and degradation mechanism by various type of UV based AOP in treating contaminants present in water and wastewater. The current application and possible improvement of the technology is also presented in this chapter.

Evaluation of advanced oxidation processes for water and wastewater treatment – A critical review

2018 ◽  
Vol 139 ◽  
pp. 118-131 ◽  
Author(s):  
David B. Miklos ◽  
Christian Remy ◽  
Martin Jekel ◽  
Karl G. Linden ◽  
Jörg E. Drewes ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Critical Review ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Water And Wastewater Treatment ◽  
Oxidation Processes ◽  
Water And Wastewater

UV-254 transformation of antibiotics in water and wastewater treatment processes

2020 ◽  
pp. 239-297 ◽  
Author(s):  
Mamatha Hopanna ◽  
Kiranmayi Mangalgiri ◽  
Temitope Ibitoye ◽  
Daniel Ocasio ◽  
Sebastian Snowberger ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Water And Wastewater Treatment ◽  
Treatment Processes ◽  
Water And Wastewater

Investigation on effects of aggregate structure in water and wastewater treatment

2004 ◽  
Vol 50 (12) ◽  
pp. 119-124 ◽  
Author(s):  
K.W. Chau
Keyword(s):  
Wastewater Treatment ◽  
Membrane Fouling ◽  
Water And Wastewater Treatment ◽  
Aggregate Structure ◽  
Bacterial Surface ◽  
Filtration Membrane ◽  
Treatment Processes ◽  
Ultra Filtration ◽  
Water And Wastewater ◽  
Filter Cakes

The fractal structure and particle size of flocs are generally recognized as the two most crucial physical properties having impact on the efficiency of operation of several unit processes in water and wastewater treatment. In this study, an experimental investigation is undertaken on the effect of aggregate structure in water and wastewater treatment in Hong Kong. The fractal dimension of the resulting aggregate is employed as a measure of the aggregate structure. Small angle light scattering technique is used here. Different amounts of polymers are mixed to bacterial suspensions and the resulting structures are examined. The addition of polymer may foster aggregate formation by neutralization of the bacterial surface charge and enhance inter-particle bridging. The aggregation behavior may affect the efficiency of certain water and wastewater treatment processes such as dewatering and coagulation. The impacts of aggregate structure on two representative processes, namely, ultra-filtration membrane fouling and pressure filter dewatering efficiency, are studied. It is found that the looser flocs yield a more porous cake and less tendency to foul whilst more porous filter cakes yield more ready biosolids dewatering.

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